en_tn/job/13/12.md

Your memorable sayings are proverbs made of ashes

Ashes represent things that are worthless and do not last. Alternate translation: "Your memorable sayings are worthless like ashes" or "Your memorable sayings will be forgotten like ashes that are blown away" (See: rc://en/ta/man/translate/figs-metaphor)

your defenses are defenses made of clay

Job speaks of what they say as if it were a wall made of clay around a city; it cannot defend the people because clay breaks easily. Alternate translation: "What you say in defense is as useless as a wall of clay" (See: rc://en/ta/man/translate/figs-metaphor)

your defenses

Possible meanings are that this refers to 1) what they say to defend themselves or 2) what they say to defend God.